Appendix D. Preparing a Remote PostgreSQL Database for Use with the Red Hat Enterprise Virtualization Manager

Optionally configure a PostgreSQL database on a remote Red Hat Enterprise Linux 6.6 or later versions of Red Hat Enterprise Linux 6 machine to use as the Manager database. By default, the Red Hat Enterprise Virtualization Manager's configuration script, engine-setup, creates and configures the Manager database locally on the Manager machine. For automatic database configuration, see Section 3.3, “Configuring the Red Hat Enterprise Virtualization Manager”. To set up the Manager database with custom values on the Manager machine, see Appendix E, Preparing a Local Manually-Configured PostgreSQL Database for Use with the Red Hat Enterprise Virtualization Manager.
Use this procedure to configure the database on a machine that is separate from the machine where the Manager is installed. Set up this database before you configure the Manager; you must supply the database credentials during engine-setup.

Note

The engine-setup and engine-backup --mode=restore commands only support system error messages in the en_US.UTF8 locale, even if the system locale is different.
The locale settings in the postgresql.conf file must be set to en_US.UTF8.

Important

The database name must contain only numbers, underscores, and lowercase letters.

Procedure D.1. Preparing a Remote PostgreSQL Database for use with the Red Hat Enterprise Virtualization Manager

  1. Install the PostgreSQL server package:
    # yum install postgresql-server
  2. Initialize the PostgreSQL database, start the postgresql service, and ensure that this service starts on boot:
    # su -l postgres -c "/usr/bin/initdb --locale=en_US.UTF8 --auth='ident' --pgdata=/var/lib/pgsql/data/"
    # service postgresql start
    # chkconfig postgresql on
  3. Connect to the psql command line interface as the postgres user:
    # su - postgres
    $ psql
  4. Create a user for the Manager to use when it writes to and reads from the database. The default user name on the Manager is engine:
    postgres=# create role user_name with login encrypted password 'password';
  5. Create a database in which to store data about the Red Hat Enterprise Virtualization environment. The default database name on the Manager is engine:
    postgres=# create database database_name owner user_name template template0 encoding 'UTF8' lc_collate 'en_US.UTF-8' lc_ctype 'en_US.UTF-8';
    
  6. Connect to the new database and add the plpgsql language:
    postgres=# \c database_name
    database_name=# CREATE LANGUAGE plpgsql;
  7. Ensure the database can be accessed remotely by enabling md5 client authentication. Edit the /var/lib/pgsql/data/pg_hba.conf file, and add the following line immediately underneath the line starting with local at the bottom of the file, replacing X.X.X.X with the IP address of the Manager:
    host    database_name    user_name    X.X.X.X/32   md5
  8. Allow TCP/IP connections to the database. Edit the /var/lib/pgsql/data/postgresql.conf file and add the following line:
    listen_addresses='*'
    This example configures the postgresql service to listen for connections on all interfaces. You can specify an interface by giving its IP address.
  9. Open the default port used for PostgreSQL database connections, and save the updated firewall rules:
    # iptables -I INPUT 5 -p tcp --dport 5432 -j ACCEPT
    # service iptables save
  10. Restart the postgresql service:
    # service postgresql restart
Optionally, set up SSL to secure database connections using the instructions at http://www.postgresql.org/docs/8.4/static/ssl-tcp.html#SSL-FILE-USAGE.